Question

Dr. Brown would like to study how energy drinks affect mental alertness. A sample of n = 9 college students is obtained, and each student's performance on a visual tracking task is measured before and after drinking Red Bull. The average score dropped by M 14 points after the meal with SS = 1152 for the difference scores. Calculate the t-value and determine if there is a significant difference in performance before drinking versus after drinking using an alpha of .05. t 3.50, reject the null hypothesis, there is a significant effect t 2.30, reject the null hypothesis, there is a significant effect t=0.50, fail to reject the null hypothesis, there is no significant effect cannot be determine from the information given

Answer 1

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